i have had the same kind of thing. a big bloke came out and sed stop riding you're pissing me off, so i did as my mate had just bent his mec hanger so i was bending it back and the bloke ran out pushed my mate off his bike and started "trying" to ride off on his bike. i had an ajustable spanner in my hand so launched it at him while running at him, got the bike back and the bloke never moaned at us again. i think it was more to the point he was drunk x